scripts/contrib/oe-build-perf-report-email.py: remove obsolete check for phantomjs and optipng

Use of those tools was removed in b5c131006e3fad0a15e6cdf81f71dc1e96647028
perf-build-test/report: Drop phantomjs and html email reports support

(From OE-Core rev: 33df447affa7a3a360b1da028e6b12fbcd388db6)

Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/contrib/oe-build-perf-report-email.py

@@ -27,17 +27,6 @@ logging.basicConfig(level=logging.INFO, format="%(levelname)s: %(message)s")
 log = logging.getLogger('oe-build-perf-report')
 
 
-def check_utils():
-    """Check that all needed utils are installed in the system"""
-    missing = []
-    for cmd in ('phantomjs', 'optipng'):
-        if not shutil.which(cmd):
-            missing.append(cmd)
-    if missing:
-        log.error("The following tools are missing: %s", ' '.join(missing))
-        sys.exit(1)
-
-
 def parse_args(argv):
     """Parse command line arguments"""
     description = """Email build perf test report"""
@@ -101,8 +90,6 @@ def main(argv=None):
     if args.debug:
         log.setLevel(logging.DEBUG)
 
-    check_utils()
-
     if args.outdir:
         outdir = args.outdir
         if not os.path.exists(outdir):