ArrayBuilder: remove an extra method confusing Xcode 14.3

Newer Xcode was complaining about ambiguity between `buildBlock(T)` and
`buildBlock(T...)` on our own unit test. I've left the latter as a more general
one.

MMMCommonCore.podspec

@@ -6,7 +6,7 @@
 Pod::Spec.new do |s|
 
 	s.name = "MMMCommonCore"
-	s.version = "1.15.0"
+	s.version = "1.15.1"
 	s.summary = "Small bits and pieces reused in many pods from MMMTemple"
 	s.description =  s.summary
 	s.homepage = "https://github.com/mediamonks/#{s.name}"

Sources/MMMCommonCore/ArrayBuilder.swift

@@ -61,10 +61,6 @@ public struct ArrayBuilder<T> {
 		return []
 	}
 
-	public static func buildBlock(_ component: T) -> [T] {
-		return [component]
-	}
-
 	public static func buildBlock(_ components: T...) -> [T] {
 		return components
 	}