Remove outdated ruby patch

patches/ruby/unused_param.patch

@@ -1,25 +0,0 @@
-diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
-index 0a8407a..22dff42 100644
---- a/include/ruby/ruby.h
-+++ b/include/ruby/ruby.h
-@@ -1207,6 +1207,9 @@ rb_obj_wb_unprotect(VALUE x, const char *filename, int line)
-     RGENGC_LOGGING_WB_UNPROTECT((void *)x, filename, line);
- #endif
- 
-+	(void) filename;
-+	(void) line;
-+
- #if USE_RGENGC
-     /* `x' should be an RVALUE object */
-     if (FL_TEST_RAW((x), FL_WB_PROTECTED)) {
-@@ -1227,6 +1230,10 @@ rb_obj_written(VALUE a, VALUE oldv, VALUE b, const char *filename, int line)
-     RGENGC_LOGGING_OBJ_WRITTEN(a, oldv, b, filename, line);
- #endif
- 
-+	(void) oldv;
-+	(void) filename;
-+	(void) line;
-+
- #if USE_RGENGC
-     /* `a' should be an RVALUE object */
-     if (FL_TEST_RAW((a), FL_OLDGEN) &&