Store extnames in samples.yml

lib/linguist/languages.yml

@@ -184,14 +184,9 @@ C++:
   primary_extension: .cpp
   extensions:
   - .c++
-  - .cc
-  - .cpp
-  - .cu
   - .cxx
-  - .h
   - .h++
   - .hh
-  - .hpp
   - .hxx
   - .tcc
 
@@ -401,7 +396,6 @@ Emacs Lisp:
   - emacs
   primary_extension: .el
   extensions:
-  - .el
   - .emacs
 
 Erlang:
@@ -544,8 +538,6 @@ Groovy Server Pages:
   aliases:
   - gsp
   primary_extension: .gsp
-  extensions:
-  - .gsp
 
 HTML:
   type: markup
@@ -909,8 +901,6 @@ Parrot Internal Representation:
   aliases:
   - pir
   primary_extension: .pir
-  extensions:
-  - .pir
 
 Parrot Assembly:
   group: Parrot
@@ -919,8 +909,6 @@ Parrot Assembly:
   aliases:
   - pasm
   primary_extension: .pasm
-  extensions:
-  - .pasm
 
 Perl:
   type: programming