tools: Remove gcc version check warning

Remove the GCC version check warning, as it's not necessary for the
tools to print supported GCC versions. Refer to the documentation for
the version of Mbed OS you are using instead. The warning is likewise
not future proof, as newer versions of GCC may work fine, yet annoyingly
one still sees a warning about it.

Author: Patater

tools/toolchains/gcc.py

@@ -36,8 +36,6 @@ class GCC(mbedToolchain):
     STD_LIB_NAME = "lib%s.a"
     DIAGNOSTIC_PATTERN = re.compile('((?P<file>[^:]+):(?P<line>\d+):)(?P<col>\d+):? (?P<severity>warning|[eE]rror|fatal error): (?P<message>.+)')
 
-    GCC_RANGE = (LooseVersion("9.0.0"), LooseVersion("10.0.0"))
-    GCC_VERSION_RE = re.compile(b"\d+\.\d+\.\d+")
     DWARF_PRODUCER_RE = re.compile(r'(DW_AT_producer)(.*:\s*)(?P<producer>.*)')
 
     def __init__(self, target,  notify=None, macros=None, build_profile=None,
@@ -179,31 +177,7 @@ def __init__(self, target,  notify=None, macros=None, build_profile=None,
                 self.coverage_ld.remove(flag)
 
     def version_check(self):
-        stdout, _, retcode = run_cmd([self.cc[0], "--version"], redirect=True)
-        msg = None
-        match = self.GCC_VERSION_RE.search(stdout.encode("utf-8"))
-        if match:
-            found_version = LooseVersion(match.group(0).decode('utf-8'))
-        else:
-            found_version = None
-        min_ver, max_ver = self.GCC_RANGE
-        if found_version and (found_version < min_ver
-                              or found_version >= max_ver):
-            msg = ("Compiler version mismatch: Have {}; "
-                   "expected version >= {} and < {}"
-                   .format(found_version, min_ver, max_ver))
-        elif not match:
-            msg = ("Compiler version mismatch: Could not detect version; "
-                   "expected version >= {} and < {}"
-                   .format(min_ver, max_ver))
-        if msg:
-            self.notify.cc_info({
-                "message": msg,
-                "file": "",
-                "line": "",
-                "col": "",
-                "severity": "Warning",
-            })
+        return
 
     def is_not_supported_error(self, output):
         return "error: #error [NOT_SUPPORTED]" in output