bitbake: data_smart: Micro optimise _remove handling

This brings _remove handling into line with _append/_prepend with regard
to the parsing flag to getVarFlag.

This is an internal flag and the only times this is used is through getVar
during renameVar operations and when processing ?= operations to see if
a variable is set. In either case we don't need to process remove operations.

Therefore take the minor speedup and skip processing for parsing=True.

[YOCTO #10945]

(Bitbake rev: 6d19eb3226b59922c0f888e33b28443635151501)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/data_smart.py

@@ -805,7 +805,7 @@ class DataSmart(MutableMapping):
                 cachename = var + "[" + flag + "]"
             value = self.expand(value, cachename)
 
-        if value and flag == "_content" and local_var is not None and "_remove" in local_var:
+        if value and flag == "_content" and local_var is not None and "_remove" in local_var and not parsing:
             removes = []
             self.need_overrides()
             for (r, o) in local_var["_remove"]: