mypy: Remove logic for linecoverage report.

tools/run-mypy

@@ -35,8 +35,6 @@ parser.add_argument('-a', '--all', action='store_true',
                     help="check all files, bypassing the default exclude list")
 parser.add_argument('--force', action="store_true",
                     help="run tests despite possible provisioning problems")
-parser.add_argument('--linecoverage-report', action='store_true',
-                    help="emit a coverage report under var/")
 args = parser.parse_args()
 
 if not args.force:
@@ -77,9 +75,6 @@ if not python_files and not pyi_files:
     sys.exit(0)
 
 extra_args = []
-if args.linecoverage_report:
-    extra_args.append("--linecoverage-report")
-    extra_args.append("var/linecoverage-report")
 if args.quick:
     extra_args.append("--quick")
 
@@ -89,12 +84,4 @@ if args.daemon:
 else:
     rc = subprocess.call([mypy_command] + mypy_args)
 
-if args.linecoverage_report:
-    # Move the coverage report to where codecov will look for it.
-    try:
-        os.rename('var/linecoverage-report/coverage.txt', 'var/.coverage')
-    except OSError:
-        # maybe mypy crashed; exit with its error code
-        pass
-
 sys.exit(rc)