Add /d option to alias command that removes existing alias

* Remove separate unalias script and add `unalias` alias ^) for `alias /d`

bin/alias.bat

@@ -4,6 +4,8 @@ set ALIASES="%CMDER_ROOT%\config\aliases"
 
 if ["%1"] == ["/?"] goto:p_help
 if ["%1"] == ["/reload"] goto:p_reload
+:: /d flag for delete existing alias
+if ["%1"] == ["/d"] goto:p_del %*
 if ["%2"] == [""] echo Insufficient parameters. & goto:p_help
 ::validate alias
 setlocal
@@ -24,6 +26,12 @@ doskey /macrofile=%ALIASES%
 endlocal
 goto:eof
 
+:p_del
+findstr /b /v /i "%2=" %ALIASES% >> %ALIASES%.tmp
+type %ALIASES%.tmp > %ALIASES% & @del /f /q %ALIASES%.tmp
+doskey /macrofile=%ALIASES%
+goto:eof
+
 :p_reload
 doskey /macrofile=%ALIASES%
 echo Aliases reloaded

bin/unalias.bat

@@ -1,28 +0,0 @@
-@echo off
-if ["%1"] == ["/?"] goto:p_help
-if ["%1"] == [""] echo Insufficient parameters. & goto:p_help
-
-setlocal
-
-:: Check if alias exists
-doskey /macros | findstr /b %1= >NUL || goto :p_not_found
-
-:: Remove alias from current shell
-doskey %1=
-
-:: Remove alias from aliases file
-copy /y "%CMDER_ROOT%\config\aliases" "%TEMP%\aliases.prev" >NUL
-type "%TEMP%\aliases.prev" | findstr /b /v %1= > "%CMDER_ROOT%\config\aliases"
-echo Alias removed
-
-endlocal
-goto:eof
-
-:p_not_found
-echo Alias not defined.
-goto:eof
-
-:p_help
-echo.Usage:
-echo.	unalias name
-echo.	For more information, read DOSKEY/?

config/aliases

@@ -4,3 +4,4 @@ ls=ls --color $*
 pwd=cd
 clear=cls
 history=cat %CMDER_ROOT%\config\.history
+unalias=alias /d $1