#1081 Remove the ale#python#IsExecutable function

autoload/ale/fixers/autopep8.vim

@@ -12,7 +12,7 @@ function! ale#fixers#autopep8#Fix(buffer) abort
     \   ['autopep8'],
     \)
 
-    if !ale#python#IsExecutable(l:executable)
+    if !executable(l:executable)
         return 0
     endif
 

autoload/ale/fixers/isort.vim

@@ -11,7 +11,7 @@ function! ale#fixers#isort#Fix(buffer) abort
     \   ['isort'],
     \)
 
-    if !ale#python#IsExecutable(l:executable)
+    if !executable(l:executable)
         return 0
     endif
 

autoload/ale/fixers/yapf.vim

@@ -11,7 +11,7 @@ function! ale#fixers#yapf#Fix(buffer) abort
     \   ['yapf'],
     \)
 
-    if !ale#python#IsExecutable(l:executable)
+    if !executable(l:executable)
         return 0
     endif
 

autoload/ale/python.vim

@@ -74,12 +74,6 @@ function! ale#python#FindVirtualenv(buffer) abort
     return $VIRTUAL_ENV
 endfunction
 
-" Run an executable check for Python scripts.
-" On Windows, 1 will be returned if the file is merely readable.
-function! ale#python#IsExecutable(path) abort
-    return executable(a:path)
-endfunction
-
 " Given a buffer number and a command name, find the path to the executable.
 " First search on a virtualenv for Python, if nothing is found, try the global
 " command. Returns an empty string if cannot find the executable
@@ -96,7 +90,7 @@ function! ale#python#FindExecutable(buffer, base_var_name, path_list) abort
             \   join([l:virtualenv, s:bin_dir, l:path], s:sep)
             \)
 
-            if ale#python#IsExecutable(l:ve_executable)
+            if executable(l:ve_executable)
                 return l:ve_executable
             endif
         endfor