diff --git a/src/calf/lv2_persist.h b/src/calf/lv2_persist.h
deleted file mode 100644
index 86ac86596..000000000
--- a/src/calf/lv2_persist.h
+++ /dev/null
@@ -1,130 +0,0 @@
-// This file is in the public domain.
-// Written by Leonard Ritter <paniq@paniq.org>
-
-#ifndef __LV2_PERSIST_H__
-#define __LV2_PERSIST_H__
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-    
-/*
-    Indicates that the plugin supports persistence, which means
-    being able to save and restore internal state, allowing hosts to
-    save configuration with a project, or to clone a plugin, including
-    internal state.
-    
-    The plugin should always expose this feature as optional.
-*/
-#define LV2_PERSIST_URI "http://paniq.org/lv2/persist"
-   
-/*
-    Causes the host to store a binary blob in a map.
-    
-    A callback provided by the host to LV2_Persist.save(). 'callback_data'
-    must be the callback_data argument passed to save(). 'key' is a private
-    string or URI under which the data is to be stored. 'value' points to
-    the binary blob to be stored. 'size' is the size of the binary blob in
-    bytes.
-    
-    The host is expected store a copy of the blob under the provided key.
-    
-    A 'size' of 0 is valid. The host may choose to store nothing.
-    
-    A 'size' of -1 indicates that 'value' points to a zero-terminated string.
-    This is a convenience function which requires the host to calculate the
-    size from strlen(value)+1.
-*/
-typedef void (*LV2_Persist_Store_Function)(void *callback_data, const char *key, 
-                                           const void *value, ssize_t size);
-
-/*
-    Causes the host to retrieve a binary blob from the map.
-    
-    A callback provided by the host to LV2_Persist.restore(). 'callback_data'
-    must be the callback_data argument passed to restore(). 'key' is a private
-    string or URI under which a blob has been previously stored.
-    
-    When the blob could be successfully retrieved, retrieve() must return
-    a pointer to the blob and set 'size' to the length of value in bytes.
-    
-    'size' may be NULL. In this case, no return of the blob size is required.
-    This is a convenience function to retrieve zero-terminated strings.
-    
-    The returned value must remain valid until restore() returns. The plugin
-    is required to make a copy if it needs to continue working with the
-    data. It must not attempt to access a retrieved blob pointer outside
-    of the restore context.
-*/
-typedef const void *(*LV2_Persist_Retrieve_Function)(void *callback_data, 
-                                const char *key, size_t *size);
-
-/*
-    When the plugins extension_data is called with argument LV2_PERSIST_URI,
-    the plugin is expected to return an LV2_Persist structure, which remains
-    valid indefinitely.
-    
-    The host can use the exposed function pointers to save and restore
-    the state of a plugin to a map of string keys to binary blobs at any
-    time.
-    
-    The usual application would be to save the plugins state when the
-    project document is to be saved, and to restore the state when
-    a project document has been loaded. Other applications are possible.
-    
-    Blob maps are meant to be only compatible between instances of the
-    same plugin. However, should a future extension require persistent
-    data to follow an URI key naming scheme, this restriction no longer
-    applies.
-*/
-struct LV2_Persist {
-    /*
-        Causes the plugin to save state data which it wants to preserve
-        across plugin lifetime using a store callback provided by
-        the host.
-    
-        'instance' is the instance handle of the plugin. 'callback_data'
-        is an opaque pointer to host data, e.g. the map or file where
-        the blobs are to be stored, it should be passed to 'store',
-        which is a host-supplied function to store a blob. For more
-        information, see LV2_Persist_Store_Function.
-    
-        The map on which save() operates must always be empty before
-        the first call to store(). The plugin is expected to store all
-        blobs of interest.
-    
-        The callback data pointer and store function may not be used
-        beyond the scope of save().
-    */
-    void (*save)(LV2_Handle instance, 
-        LV2_Persist_Store_Function store, void *callback_data);
-    
-    /*
-        Causes the plugin to restore state data using a retrieve callback
-        provided by the host.
-        
-        'instance' is the instance handle of the plugin. 'callback_data'
-        is an opaque pointer to host data, e.g. the map or file where
-        the blobs are to be retrieved from; it should be passed to
-        'retrieve', which is a host-supplied function to retrieve blobs.
-        For more information, see LV2_Persist_Retrieve_Function.
-
-        The map on which restore() operates must contain values stored
-        by a plugin instance of the same class, or be empty.
-
-        The plugin must gracefully fall back to a default value
-        when a blob can not be retrieved. This allows the host to reset
-        the plugin state with an empty map.
-        
-        The callback data pointer and store function may not be used
-        beyond the scope of save().
-    */
-    void (*restore)(LV2_Handle instance, 
-        LV2_Persist_Retrieve_Function retrieve, void *callback_data);
-};
-
-#ifdef __cplusplus
-} /* extern "C" */
-#endif
-
-#endif /* __LV2_PERSIST_H__ */
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