Fix stray double semicolons

Reported-by: John Naylor <john.naylor@enterprisedb.com>

src/backend/access/brin/brin_minmax.c

@@ -171,7 +171,7 @@ brin_minmax_consistent(PG_FUNCTION_ARGS)
 		 * break out of the loop as soon as a false return value is obtained.
 		 */
 		if (!minmax_consistent_key(bdesc, column, key, colloid))
-			PG_RETURN_DATUM(false);;
+			PG_RETURN_DATUM(false);
 	}
 
 	PG_RETURN_DATUM(true);

src/backend/utils/adt/timestamp.c

@@ -3842,7 +3842,7 @@ timestamp_bin(PG_FUNCTION_ARGS)
 	stride_usecs = stride->day * USECS_PER_DAY + stride->time;
 
 	tm_diff = timestamp - origin;
-	tm_delta = tm_diff - tm_diff % stride_usecs;;
+	tm_delta = tm_diff - tm_diff % stride_usecs;
 
 	result = origin + tm_delta;
 
@@ -4013,7 +4013,7 @@ timestamptz_bin(PG_FUNCTION_ARGS)
 	stride_usecs = stride->day * USECS_PER_DAY + stride->time;
 
 	tm_diff = timestamp - origin;
-	tm_delta = tm_diff - tm_diff % stride_usecs;;
+	tm_delta = tm_diff - tm_diff % stride_usecs;
 
 	result = origin + tm_delta;