Fixup some bits on the mini juce

source/modules/juce_audio_graph/containers/juce_Variant.cpp

@@ -439,10 +439,6 @@ var::var() noexcept : type (&VariantType_Void::instance) {}
 var::var (const VariantType& t) noexcept  : type (&t) {}
 var::~var() noexcept  { type->cleanUp (value); }
 
-#if JUCE_ALLOW_STATIC_NULL_VARIABLES
-const var var::null;
-#endif
-
 //==============================================================================
 var::var (const var& valueToCopy)  : type (valueToCopy.type)
 {

source/modules/juce_audio_graph/files/juce_File.cpp

@@ -70,10 +70,6 @@ File& File::operator= (File&& other) noexcept
 }
 #endif
 
-#if JUCE_ALLOW_STATIC_NULL_VARIABLES
-const File File::nonexistent;
-#endif
-
 //==============================================================================
 static String removeEllipsis (const String& path)
 {

source/modules/juce_audio_graph/files/juce_File.h

@@ -95,15 +95,6 @@ public:
     File& operator= (File&&) noexcept;
    #endif
 
-    //==============================================================================
-   #if JUCE_ALLOW_STATIC_NULL_VARIABLES
-    /** This static constant is used for referring to an 'invalid' file.
-        Bear in mind that you should avoid this kind of static variable, and always prefer
-        to use File() or {} if you need a default-constructed File object.
-    */
-    static const File nonexistent;
-   #endif
-
     //==============================================================================
     /** Checks whether the file actually exists.
 

source/modules/juce_audio_graph/text/juce_StringArray.cpp

@@ -119,12 +119,8 @@ const String& StringArray::operator[] (const int index) const noexcept
     if (isPositiveAndBelow (index, strings.size()))
         return strings.getReference (index);
 
-   #if JUCE_ALLOW_STATIC_NULL_VARIABLES
-    return String::empty;
-   #else
     static String empty;
     return empty;
-   #endif
 }
 
 String& StringArray::getReference (const int index) noexcept

source/modules/juce_audio_graph/xml/juce_XmlElement.cpp

@@ -466,12 +466,8 @@ int XmlElement::getNumAttributes() const noexcept
 
 static const String& getEmptyStringRef() noexcept
 {
-   #if JUCE_ALLOW_STATIC_NULL_VARIABLES
-    return String::empty;
-   #else
     static String empty;
     return empty;
-   #endif
 }
 
 const String& XmlElement::getAttributeName (const int index) const noexcept