Merge math and hash packages

source/tanya/range/primitive.d

@@ -140,44 +140,6 @@ private struct Primitive(Candidate, string primitive)
     }
 }
 
-/**
- * Determines whether `r1.front` and `r2.front` point to the same element.
- *
- * Params:
- *  r1 = First range.
- *  r2 = Second range.
- *
- * Returns: $(D_KEYWORD true) if $(D_PARAM r1) and $(D_PARAM r2) have the same
- *          head, $(D_KEYWORD false) otherwise.
- */
-bool sameHead(Range)(Range r1, Range r2) @trusted
-if (isInputRange!Range && hasLvalueElements!Range)
-{
-    return &r1.front is &r2.front;
-}
-
-///
-@nogc nothrow pure @safe unittest
-{
-    const int[2] array;
-
-    auto r1 = array[];
-    auto r2 = array[];
-
-    assert(sameHead(r1, r2));
-}
-
-///
-@nogc nothrow pure @safe unittest
-{
-    const int[2] array;
-
-    auto r1 = array[];
-    auto r2 = array[1 .. $];
-
-    assert(!sameHead(r1, r2));
-}
-
 /**
  * Returns the first element and advances the range.
  *