Remove placeholder text in proto snippets.

Author: SirVer

UltiSnips/proto.snippets

@@ -32,17 +32,17 @@ endsnippet
 
 snippet reqf "Required field" b
 // ${4:TODO(`whoami`): Describe this field.}
-optional ${1:type}`!p snip.rv = complete(t[1], FIELD_TYPES)` ${2:name} = ${3:1};  // Required
+optional ${1}`!p snip.rv = complete(t[1], FIELD_TYPES)` ${2:name} = ${3:1};  // Required
 endsnippet
 
 snippet optf "Optional field" b
 // ${4:TODO(`whoami`): Describe this field.}
-optional ${1:type}`!p snip.rv = complete(t[1], FIELD_TYPES)` ${2:name} = ${3:1};
+optional ${1}`!p snip.rv = complete(t[1], FIELD_TYPES)` ${2:name} = ${3:1};
 endsnippet
 
 snippet repf "Repeated field" b
 // ${4:TODO(`whoami`): Describe this field.}
-repeated ${1:type}`!p snip.rv = complete(t[1], FIELD_TYPES)` ${2:name} = ${3:1};
+repeated ${1}`!p snip.rv = complete(t[1], FIELD_TYPES)` ${2:name} = ${3:1};
 endsnippet
 
 snippet enum "Enumeration" b