Remove deprecated Mustache patch

kiwixbuild/dependencies/mustache.py

@@ -13,7 +13,6 @@ class Mustache(Dependency):
         archive = Remotefile('Mustache-4.1.tar.gz',
                              'acd66359feb4318b421f9574cfc5a511133a77d916d0b13c7caa3783c0bfe167',
                              'https://github.com/kainjow/Mustache/archive/v4.1.tar.gz')
-        patches = ['mustache_virtual_destructor.patch']
 
     class Builder(BaseBuilder):
         def build(self):

kiwixbuild/patches/mustache_virtual_destructor.patch

@@ -1,11 +0,0 @@
-diff -u mustache/mustache.hpp mustache.patched/mustache.hpp
---- mustache/mustache.hpp	2018-07-23 05:13:12.000000000 +0200
-+++ mustache.patched/mustache.hpp	2019-01-07 18:08:24.601917507 +0100
-@@ -423,6 +423,7 @@
- template <typename string_type>
- class basic_context {
- public:
-+    virtual ~basic_context() = default;
-     virtual void push(const basic_data<string_type>* data) = 0;
-     virtual void pop() = 0;
-