localrepo/branchcache: remove lbranchmap(), convert users to use utf-8 names
We don't need a "local-charset" aware branchmap() function, we can convert the
names when needed during the output.
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%% uncompressed contents in repo
this is a test
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1 files updated, 0 files merged, 0 files removed, 0 files unresolved
%% uncompress our new working dir copy
this is a test
%% check hg cat operation
this is a test
this is a test
this is a test
this is a test