Bug 1558517 - Pre 5: Remove redundant or unused globs from .prettierignore, r=standard8

Differential Revision: https://phabricator.services.mozilla.com/D35577

--HG--
extra : source : d64acf8c7f7c0943a3f37700b6ce5595c0b6bafe
extra : intermediate-source : dce409a19acf96e5afb990c7ba8d800fe1973c59

.prettierignore

@@ -14,7 +14,6 @@ build/**
 caps/**
 chrome/**
 config/**
-db/**
 docshell/**
 dom/**
 editor/**
@@ -34,7 +33,6 @@ mobile/**
 modules/**
 mozglue/**
 netwerk/**
-node_modules/**
 nsprpub/**
 other-licenses/**
 parser/**
@@ -47,7 +45,6 @@ startupcache/**
 storage/**
 taskcluster/**
 testing/**
-third_party/**
 toolkit/**
 tools/**
 uriloader/**