[fix] Remove isAllowedScript leftovers (#6366)

Fixes #6365

frontend/apps/filemanager/filemanagercollection.lua

@@ -94,7 +94,7 @@ function FileManagerCollection:onMenuHold(item)
         },
     }
     -- NOTE: Duplicated from frontend/apps/filemanager/filemanager.lua
-    if not Device:isAndroid() and util.isAllowedScript(item.file) then
+    if Device:canExecuteScript(item.file) then
         table.insert(buttons, {
             {
                 -- @translators This is the script's programming language (e.g., shell or python)

frontend/document/credocument.lua

@@ -1035,7 +1035,7 @@ function CreDocument:register(registry)
     registry:addProvider("rtf", "application/rtf", self, 90)
     registry:addProvider("xhtml", "application/xhtml+xml", self, 90)
     registry:addProvider("zip", "application/zip", self, 10)
-    -- Scripts that we allow running in the FM (c.f., util.isAllowedScript)
+    -- Scripts that we allow running in the FM (c.f., Device:canExecuteScript)
     registry:addProvider("sh", "application/x-shellscript", self, 90)
     registry:addProvider("py", "text/x-python", self, 90)
 end

frontend/util.lua

@@ -722,7 +722,7 @@ end
 --- Companion helper function that returns the script's language,
 --- based on the filme extension.
 ---- @string filename
----- @treturn string (lowercase) (or nil if !isAllowedScript)
+---- @treturn string (lowercase) (or nil if not Device:canExecuteScript(file))
 function util.getScriptType(file)
     local file_ext = string.lower(util.getFileNameSuffix(file))
     if file_ext == "sh" then