csv_metadata_quality/check.py: Simplify AGROVOC check

I recycled this code from a separate agrovoc-lookup.py script that
checks lines in a text file to see if they are valid AGROVOC terms
or not. There I was concerned about skipping comments or something
I think, but we don't need to check that here. We simply check the
term that is in the field and inform the user if it's valid or not.

csv_metadata_quality/check.py

@@ -212,7 +212,6 @@ def agrovoc(field, field_name):
     """
 
     from datetime import timedelta
-    import re
     import requests
     import requests_cache
 
@@ -222,18 +221,6 @@ def agrovoc(field, field_name):
 
     # Try to split multi-value field on "||" separator
     for value in field.split('||'):
-        # match lines beginning with words, paying attention to subjects with
-        # special characters like spaces, quotes, dashes, parentheses, etc:
-        # SUBJECT
-        # ANOTHER SUBJECT
-        # XANTHOMONAS CAMPESTRIS PV. MANIHOTIS
-        # WOMEN'S PARTICIPATION
-        # COMMUNITY-BASED FOREST MANAGEMENT
-        # INTERACCIÓN GENOTIPO AMBIENTE
-        # COCOA (PLANT)
-        pattern = re.compile(r'^[\w\-\.\'\(\)]+?[\w\s\-\.\'\(\)]+$')
-
-        if pattern.match(value):
         request_url = f'http://agrovoc.uniroma2.it/agrovoc/rest/v1/agrovoc/search?query={value}'
 
         # enable transparent request cache with thirty days expiry