remove redundant Documentation tag

vim/basic_vim.md

@@ -1,6 +1,6 @@
 ---
 title: "vim basics"
-tags: [ "Documentation", "vim", "basic" ]
+tags: [ "vim", "basic" ]
 ---
 
 1. Insert text by pressing `i`.

vim/navigate.md

@@ -1,6 +1,6 @@
 ---
 title: "vim navigation"
-tags: [ "Documentation", "vim" ]
+tags: [ "vim" ]
 ---
 
 | Move | Command      |

vim/vim-completion.md

@@ -1,6 +1,6 @@
 ---
 title: "vim completion"
-tags: [ "Documentation", "vim" ]
+tags: [ "vim" ]
 ---
 
 Complete the word by searching for the *n*ext similar word:

vim/vim-search.md

@@ -1,6 +1,6 @@
 ---
 title: "vim search"
-tags: [ "Documentation", "vim" ]
+tags: [ "vim" ]
 ---
 Search for the next and or previous occurrence of the word under your cursor with `*` and `#`.
 

vim/vim-windows.md

@@ -1,6 +1,6 @@
 ---
 title: "vim windows"
-tags: [ "Documentation", "vim" ]
+tags: [ "vim" ]
 ---
 
 | Command | Keys |

vim/vim_tricks.md

@@ -1,6 +1,6 @@
 ---
 title: "Vim Tricks"
-tags: [ "Documentation", "vim" ]
+tags: [ "vim" ]
 ---
 
 ## Remote Editing