systemc: Stop filtering out warnings about unimplemented features.

These no longer cause any of the tests to break, so there's no reason
to filter them out.

Change-Id: I9c0b25fc42eb3060ac7d6d6a46ded130227c302d
Reviewed-on: https://gem5-review.googlesource.com/c/13396
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>

src/systemc/tests/verify.py

@@ -265,7 +265,6 @@ class LogChecker(DiffingChecker):
     test_filt = merge_filts(
         r'^Global frequency set at \d* ticks per second\n',
         r'^info: Entering event queue @ \d*\.  Starting simulation\.\.\.\n',
-        r'warn: [^(]+\([^)]*\)( \[with [^]]*\])? not implemented\.\n',
         r'warn: Ignoring request to set stack size\.\n',
         info_filt(804),
         in_file_filt,