Switch to using atom-fsharp language definition

The previous definition used at fsharpbinding is no longer maintained.
That repository has been split into separate parts for each editor. Atom
now has the most complete compatible grammar.

.gitmodules

@@ -133,9 +133,6 @@
 [submodule "vendor/grammars/fancy-tmbundle"]
 	path = vendor/grammars/fancy-tmbundle
 	url = https://github.com/fancy-lang/fancy-tmbundle
-[submodule "vendor/grammars/fsharpbinding"]
-	path = vendor/grammars/fsharpbinding
-	url = https://github.com/fsharp/fsharpbinding
 [submodule "vendor/grammars/monkey.tmbundle"]
 	path = vendor/grammars/monkey.tmbundle
 	url = https://github.com/gingerbeardman/monkey.tmbundle
@@ -644,3 +641,6 @@
 [submodule "vendor/grammars/smali-sublime"]
 	path = vendor/grammars/smali-sublime
 	url = https://github.com/ShaneWilton/sublime-smali
+[submodule "vendor/grammars/atom-fsharp"]
+	path = vendor/grammars/atom-fsharp
+	url = https://github.com/fsprojects/atom-fsharp

grammars.yml

@@ -169,6 +169,8 @@ vendor/grammars/asp.tmbundle:
 vendor/grammars/assembly.tmbundle:
 - objdump.x86asm
 - source.x86asm
+vendor/grammars/atom-fsharp/:
+- source.fsharp
 vendor/grammars/atom-salt:
 - source.python.salt
 - source.yaml.salt
@@ -247,8 +249,6 @@ vendor/grammars/fish-tmbundle:
 vendor/grammars/fortran.tmbundle:
 - source.fortran
 - source.fortran.modern
-vendor/grammars/fsharpbinding:
-- source.fsharp
 vendor/grammars/gap-tmbundle/:
 - source.gap
 vendor/grammars/gettext.tmbundle: