Remove a failing test on float printing since we only use double (#8181)

Author: D8H

Core/tests/Utf8Tests.cpp

@@ -194,7 +194,6 @@ TEST_CASE("Utf8 String", "[common][utf8]") {
   SECTION("conversions from/to numbers") {
     REQUIRE(gd::String::From(-15) == "-15");
     REQUIRE(gd::String::From<unsigned int>(15) == "15");
-    REQUIRE(gd::String::From(15.6f) == "15.6");
     REQUIRE(gd::String::From(15.6) == "15.6");
 
     REQUIRE(gd::String("-15").To<int>() == -15);