Removing mention of submodules from docs/build

appveyor.yml

@@ -55,7 +55,6 @@ install:
         $fileContent += "`n-----END RSA PRIVATE KEY-----`n";
         Set-Content c:\users\appveyor\.ssh\id_rsa $fileContent
         }
-    - git submodule update --init --recursive
     - ps: $prerelease = "nightly."
     - ps: $prerelease += Get-Date -format "yyyy.M.d"
     - ps: if($env:appveyor_repo_branch -eq 'release') { Set-Content prerelease.txt $null } else { Set-Content prerelease.txt $prerelease }

docs/installing-solidity.rst

@@ -245,12 +245,6 @@ you should fork Solidity and add your personal fork as a second remote:
 
     git remote add personal git@github.com:[username]/solidity.git
 
-Solidity has git submodules.  Ensure they are properly loaded:
-
-.. code-block:: bash
-
-   git submodule update --init --recursive
-
 External Dependencies
 ---------------------