remove unrelated term

glossary.yml

@@ -1,7 +1,6 @@
 - slug: concatenate
   ref:
     - aggregation
-    - creative_commons_license
     - left_join
     - right_join
   en:
@@ -3645,23 +3644,11 @@
       program can [import](#import) it. In most languages a module must export things
       explicitly in an attempt to avoid [name collision](#name_collision).
 
-- slug: factor
-  ref:
-    - base_r
-    - vector
-  en:
-    term: "factor"
-    def: >
-      An R data structure for efficiently storing vectors of categorical data, encoding 
-      categorical values as numerical indices into a lookup table with the respective 
-      category labels. 
-
   am:
     term: ወደ ውጭ መላክ
     def: >
       ከ [ሞዱል](#module) ውጭ የሆነ ነገር እንዲታይ ለማድረግ ሌላ የፕሮግራሙ ክፍሎች (ማስመጣት)(#import) ይችላሉ። በአብዛኛዎቹ ቋንቋዎች ሞዱል መሆን አለበት [የስም ግጭት](#name_collision) ን ለማስወገድ #ነገሮችን በግልፅ ወደ ውጭ ይላኩ ።
 
-
 - slug: fail_test
   ref:
     - pass_test