chore: move out gitlog syntax file to git.nvim

syntax/gitlog.vim

@@ -1,26 +0,0 @@
-if exists("b:current_syntax")
-    finish
-endif
-
-syntax match gitlogGraph      contained /^[*|\\\/_ ]*/
-            \ nextgroup=gitlogHash
-syntax match gitlogHash       contained /\<\x\{7,64\}\>/
-            \ nextgroup=gitlogDate skipwhite
-syntax match gitlogDate       contained /\<\d\{4}-\d\{2}-\d\{2}\>/
-            \ nextgroup=gitlogAuthor skipwhite
-syntax match gitlogAuthor     contained /{[^}]\+}/
-            \ nextgroup=gitlogRef skipwhite
-syntax match gitlogRef        contained /([^)]\+)/
-syntax match gitlogLine
-            \ /^[*|\\\/_ ]*\x\{7,64}\s\+\d\{4}-\d\{2}-\d\{2}\s\+{[^}]\+}.*/
-            \ contains=gitlogGraph
-syntax match gitlogGraphLine /^[*|\\\/_ ]\+$/
-            \ contains=gitlogGraph
-
-highlight default link gitlogGraph      Comment
-highlight default link gitlogHash       GitSha
-highlight default link gitlogDate       GitDate
-highlight default link gitlogAuthor     GitAuthor
-highlight default link gitlogRef        Constant
-
-let b:current_syntax = "gitlog"