chore: remove temp fix, set cov level to 99 (#228)

synth.py

@@ -47,20 +47,13 @@
 s.move(library / "tests")
 s.move(library / "scripts")
 
-# temporary workaround for https://github.com/googleapis/gapic-generator-python/issues/778
-s.replace(
-    "google/cloud/**/client.py",
-    """\s+if permissions:
-\s+request\.permissions\.extend\(permissions\)""",
-    "",
-)
-
 # ----------------------------------------------------------------------------
 # Add templated files
 # ----------------------------------------------------------------------------
 templated_files = common.py_library(
     samples=True,  # set to True only if there are samples
     microgenerator=True,
+    cov_level=99
 )
 s.move(templated_files, excludes=[".coveragerc"])