Remove chmod from install docs.

chmod +x is not needed because nuget.exe is never executed directly because of the alias to use the mono executable.

Author: qayshp

docs/includes/install-cli.md

@@ -15,8 +15,6 @@ Behaviors may vary slightly by OS distribution.
     ```bash
     # Download the latest stable `nuget.exe` to `/usr/local/bin`
     sudo curl -o /usr/local/bin/nuget.exe https://dist.nuget.org/win-x86-commandline/latest/nuget.exe
-    # Give the file permissions to execute
-    sudo chmod 755 /usr/local/bin/nuget.exe
     ```
 
 1. Create an alias by adding the following script to the appropriate file for your OS (typically `~/.bash_aliases` or `~/.bash_profile`):
@@ -26,4 +24,4 @@ Behaviors may vary slightly by OS distribution.
     alias nuget="mono /usr/local/bin/nuget.exe"
     ```
 
-1. Reload the shell.  Test the installation by entering `nuget` with no parameters. NuGet CLI help should display.
+1. Reload the shell.  Test the installation by entering `nuget` with no parameters. NuGet CLI help should display.