Removed unused modules.

Author: geektophe

.gitmodules

@@ -16,9 +16,6 @@
 [submodule "bundle/surround"]
 	path = bundle/surround
 	url = https://github.com/tpope/vim-surround.git
-[submodule "bundle/git"]
-	path = bundle/git
-	url = https://github.com/tpope/vim-git.git
 [submodule "bundle/supertab"]
 	path = bundle/supertab
 	url = https://github.com/ervandew/supertab.git
@@ -37,9 +34,6 @@
 [submodule "bundle/acp"]
 	path = bundle/acp
 	url = https://github.com/vim-scripts/AutoComplPop.git
-[submodule "bundle/ack"]
-	path = bundle/ack
-	url = https://github.com/mileszs/ack.vim.git
 [submodule "bundle/tagbar"]
 	path = bundle/tagbar
 	url = https://github.com/vim-scripts/Tagbar.git
@@ -49,9 +43,6 @@
 [submodule "bundle/nagios-syntax"]
 	path = bundle/nagios-syntax
 	url = https://github.com/vim-scripts/nagios-syntax.git
-[submodule "bundle/dbext"]
-	path = bundle/dbext
-	url = https://github.com/vim-scripts/dbext.vim.git
 [submodule "bundle/lightline"]
 	path = bundle/lightline
 	url = https://github.com/itchyny/lightline.vim