Get rid of s:Setf helper

heuristics.yaml

@@ -54,7 +54,7 @@ rules:
     filetype: murphi
 - if_set: "saw_comment"
   filetype: objc
-- override: "g:filetype_m"
+- override: true
 - filetype: octave
 ---
 extensions: [fs]
@@ -67,7 +67,7 @@ rules:
     filetype: fsharp
   - pattern: '\s*(#version|precision|uniform|varying|vec[234])'
     filetype: glsl
-- override: "g:filetype_fs"
+- override: true
 - filetype: forth
 ---
 extensions: [re]
@@ -98,7 +98,7 @@ rules:
     filetype: idris2
   - pattern: '^%access .*'
     filetype: idris
-- override: 'g:filetype_idr'
+- override: true
 - filetype: idris2
 ---
 extensions: [lidr]
@@ -130,7 +130,7 @@ rules:
     filetype: raku
   - pattern: '\buse\s+(?:strict\b|v?5\.)'
     filetype: perl
-- override: 'g:filetype_pm'
+- override: true
 - filetype: perl
 ---
 extensions: [pl]
@@ -147,7 +147,7 @@ rules:
     filetype: raku
   - pattern: '\buse\s+(?:strict\b|v?5\.)'
     filetype: perl
-- override: 'g:filetype_pl'
+- override: true
 - filetype: perl
 ---
 extensions: [t]
@@ -164,7 +164,7 @@ rules:
   ## I haven't found turing syntax for vim...
   # - pattern: '^\s*%[ \t]+|^\s*var\s+\w+(\s*:\s*\w+)?\s*:=\s*\w+'
   #   filetype: turing
-- override: 'g:filetype_t'
+- override: true
 - filetype: perl
 ---
 extensions: [tt2]