Remove vestiges of logging

Remove the (now non-functional) declarations of olm_set_log_level in the C and
js wrappers.

include/olm/olm.hh

@@ -415,13 +415,6 @@ size_t olm_ed25519_verify(
     void * signature, size_t signature_length
 );
 
-/**
- * Set the log level. By default, 1, which logs only FATAL messages.
- */
-void olm_set_log_level(
-    unsigned int level
-);
-
 #ifdef __cplusplus
 }
 #endif

javascript/olm_post.js

@@ -382,6 +382,4 @@ Utility.prototype['ed25519_verify'] = restore_stack(function(
 olm_exports["Account"] = Account;
 olm_exports["Session"] = Session;
 olm_exports["Utility"] = Utility;
-
-olm_exports['set_log_level'] = Module['_olm_set_log_level'];
 }();