intel/genxml: Stop manually scrubbing 'α' -> "alpha"

'α' has never appeared in any genxml files, so there's no need to
replace it with the word "alpha".

Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

src/intel/genxml/gen_bits_header.py

@@ -135,7 +135,7 @@ ${emit_per_gen_prop_func(field, 'start')}
 alphanum_nono = re.compile(r'[ /\[\]()\-:.,=>#&*"+\\]+')
 def to_alphanum(name):
     global alphanum_nono
-    return alphanum_nono.sub('', name).replace('α', 'alpha')
+    return alphanum_nono.sub('', name)
 
 def safe_name(name):
     name = to_alphanum(name)

src/intel/genxml/gen_pack_header.py

@@ -197,7 +197,6 @@ def to_alphanum(name):
         '=': '',
         '>': '',
         '#': '',
-        'α': 'alpha',
         '&': '',
         '*': '',
         '"': '',