test: remove old num_lit_call_method

vlib/v/tests/num_lit_call_method.v

@@ -1,28 +0,0 @@
-fn int_lit_call_method() {
-    x1 := 1234.str()
-    assert x1 == '1234'
-    x2 := -0xffff.str()
-    assert x2 == '-65535'
-    x3 := 0b1001001.str()
-    assert x3 == '73'
-    x4 := 0o653262.str()
-    assert x4 == '218802'
-    x5 := 0.str()
-    assert x5 == '0'
-}
-
-fn float_lit_call_method() {
-    x1 := -123.66.str()
-    assert x1 == '-1.2366e+02'
-    x2 := 12.5e-2.str()
-    assert x2 == '1.25e-01'
-    x3 := .789.str()
-    assert x3 == '7.89e-01'
-    x4 := .003e2.str()
-    assert x4 == '3.e-01'
-    x5 := 2.e-3.str() 
-    assert x5 == '2.e-03'
-    x6 := 5.0.str()
-    assert x6 == '5.e+00'
-    // x7 := 5..str()    Syntax `5.` is allowed, but do not call method on it (`5..str()` is parsed as a range). Use `5.0.str()` instead.
-}