Dropped __cplusplus guards

littlefs is not a C++ project, and it's important to make sure users are
aware of that in case the header file ever breaks C++ (C++ is _not_
compatible with C99).

So dropping these guards.

C++ users should wrap the relevant includes with extern "C":

  extern "C" {
  #include "lfs.h"
  }

bd/lfs_emubd.h

@@ -14,11 +14,6 @@
 #include "bd/lfs_rambd.h"
 #include "bd/lfs_filebd.h"
 
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-
 
 // Block device specific tracing
 #ifndef LFS_EMUBD_TRACE
@@ -264,8 +259,4 @@ int lfs_emubd_setpowercycles(const struct lfs_config *cfg,
 int lfs_emubd_cpy(const struct lfs_config *cfg, lfs_emubd_t *copy);
 
 
-#ifdef __cplusplus
-} /* extern "C" */
-#endif
-
 #endif

bd/lfs_filebd.h

@@ -11,11 +11,6 @@
 #include "lfs.h"
 #include "lfs_util.h"
 
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-
 
 // Block device specific tracing
 #ifndef LFS_FILEBD_TRACE
@@ -58,8 +53,4 @@ int lfs_filebd_erase(const struct lfs_config *cfg, lfs_block_t block);
 int lfs_filebd_sync(const struct lfs_config *cfg);
 
 
-#ifdef __cplusplus
-} /* extern "C" */
-#endif
-
 #endif

bd/lfs_rambd.h

@@ -11,11 +11,6 @@
 #include "lfs.h"
 #include "lfs_util.h"
 
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-
 
 // Block device specific tracing
 #ifndef LFS_RAMBD_TRACE
@@ -67,8 +62,4 @@ int lfs_rambd_erase(const struct lfs_config *cfg, lfs_block_t block);
 int lfs_rambd_sync(const struct lfs_config *cfg);
 
 
-#ifdef __cplusplus
-} /* extern "C" */
-#endif
-
 #endif

lfs.h

@@ -10,11 +10,6 @@
 
 #include "lfs_util.h"
 
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-
 
 /// Version info ///
 
@@ -1378,8 +1373,4 @@ int lfsr_fs_grow(lfs_t *lfs, lfs_size_t block_count);
 #endif
 
 
-#ifdef __cplusplus
-} /* extern "C" */
-#endif
-
 #endif

lfs_util.h

@@ -114,11 +114,6 @@
 #include <stdio.h>
 #endif
 
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-
 
 // Macros, may be replaced by system specific wrappers. Arguments to these
 // macros must not have side-effects as the macros can be removed for a smaller
@@ -776,9 +771,5 @@ static inline void lfs_free(void *p) {
 #endif
 
 
-#ifdef __cplusplus
-} /* extern "C" */
-#endif
-
 #endif
 #endif