storagefile: Make GetMetadataInternal static

It is only used in virstoragefile.c
Reviewed-by: NDaniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>
Signed-off-by: NCole Robinson <crobinso@redhat.com>

src/libvirt_private.syms

@@ -2988,7 +2988,6 @@ virStorageFileGetLVMKey;
 virStorageFileGetMetadata;
 virStorageFileGetMetadataFromBuf;
 virStorageFileGetMetadataFromFD;
-virStorageFileGetMetadataInternal;
 virStorageFileGetNPIVKey;
 virStorageFileGetRelativeBackingPath;
 virStorageFileGetSCSIKey;

src/util/virstoragefile.c

@@ -970,7 +970,7 @@ virStorageFileGetEncryptionPayloadOffset(const struct FileEncryptionInfo *info,
  * Note that this function may be called repeatedly on @meta, so it must
  * clean up any existing allocated memory which would be overwritten.
  */
-int
+static int
 virStorageFileGetMetadataInternal(virStorageSourcePtr meta,
                                   char *buf,
                                   size_t len,

src/util/virstoragefile.h

@@ -346,12 +346,6 @@ struct _virStorageSource {
 
 int virStorageFileProbeFormat(const char *path, uid_t uid, gid_t gid);
 
-int virStorageFileGetMetadataInternal(virStorageSourcePtr meta,
-                                      char *buf,
-                                      size_t len,
-                                      int *backingFormat)
-    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
-
 virStorageSourcePtr virStorageFileGetMetadataFromFD(const char *path,
                                                     int fd,
                                                     int format,