Remove redundant semicolons after the closing braces of functions

(cherry picked from commit 1a19ce39db)

bin/dig/readline.h

@@ -51,7 +51,7 @@ readline(const char *prompt) {
 		return NULL;
 	}
 	return buf;
-};
+}
 
 #define add_history(line)
 

lib/ns/client.c

@@ -215,7 +215,7 @@ ns_client_extendederror(ns_client_t *client, uint16_t code, const char *text) {
 	client->ede->length = len;
 	client->ede->value = isc_mem_get(client->mctx, len);
 	memmove(client->ede->value, ede, len);
-};
+}
 
 static void
 ns_client_endrequest(ns_client_t *client) {