mv default as required by Mac

Base/Axis/Bin.cpp

@@ -15,8 +15,6 @@
 #include "Base/Axis/Bin.h"
 #include "Base/Util/Assert.h"
 
-bool Bin1D::operator==(const Bin1D&) const = default;
-
 Bin1D Bin1D::FromTo(double lower, double upper)
 {
     return {lower, upper};

Base/Axis/Bin.h

@@ -24,7 +24,7 @@ public:
     static Bin1D FromTo(double lower, double upper);
     static Bin1D At(double center);
     static Bin1D At(double center, double halfwidth);
-    bool operator==(const Bin1D&) const;
+    bool operator==(const Bin1D&) const = default;
 
     double lowerBound() const { return m_lower; }
     double upperBound() const { return m_upper; }