Revert "OvmfPkg: Pass command-line args to PR Eval"

A change was made to the following pytool releases to prevent a
platform from needing to include additional logic to consider
command-line build variable parameters for PR evaluation.

- edk2-pytool-library v0.23.4
- edk2-pytool-extensions v0.29.11

Commit 33e58db was added as a workaround, but that is no longer
needed after these pytool updates, so revert it.

Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>

OvmfPkg/PlatformCI/PlatformBuildLib.py

@@ -110,21 +110,8 @@ class SettingsManager(UpdateSettingsManager, SetupSettingsManager, PrEvalSetting
 
         The tuple should be (<workspace relative path to dsc file>, <input dictionary of dsc key value pairs>)
         '''
-        import re
-        import sys
-
-        cmd_line_input_vars = {}
-        for arg in sys.argv:
-            if "=" in arg:
-                key, value = arg.split("=", 1)
-                if key.startswith("-"):
-                    continue
-                if re.match(r"BLD_.+_", key):
-                    key = re.sub(r"^BLD_.+?_", "", key, count=1)
-                cmd_line_input_vars[key] = value
-
         dsc = CommonPlatform.GetDscName(",".join(self.ActualArchitectures))
-        return (f"OvmfPkg/{dsc}", cmd_line_input_vars)
+        return (f"OvmfPkg/{dsc}", {})
 
 
     # ####################################################################################### #