Improve the compiler error by removing some noise from it.

The "deleted" overload error is useless to users. By passing some dummy string to the base class constructor we use a valid constructor and remove the unintended use of the deleted default constructor.

PiperOrigin-RevId: 452826509
Change-Id: I5430a373c8e7e3a13336d2c42899e0e59444620b

absl/strings/internal/str_format/bind.h

@@ -143,7 +143,8 @@ class FormatSpecTemplate
   template <typename T = void>
   FormatSpecTemplate(string_view s)  // NOLINT
       __attribute__((enable_if(str_format_internal::EnsureConstexpr(s),
-                               "constexpr trap"))) {
+                               "constexpr trap")))
+      : Base("to avoid noise in the compiler error") {
     static_assert(sizeof(T*) == 0,
                   "Format specified does not match the arguments passed.");
   }