Cleanup defunct SIPs

These all relied on information about deltas that is no longer available in the
AST.

src/ast/utility/SipsMetric.h

@@ -100,17 +100,6 @@ class MaxBoundSips : public SipsMetric {
             const std::vector<Atom*> atoms, const BindingStore& bindingStore) const override;
 };
 
-/** Goal: prioritise (1) all-bound, then (2) max number of bound vars, then (3) left-most, but use deltas as a
- * tiebreaker between these. */
-class MaxBoundDeltaSips : public SipsMetric {
-public:
-    MaxBoundDeltaSips() = default;
-
-protected:
-    std::vector<double> evaluateCosts(
-            const std::vector<Atom*> atoms, const BindingStore& bindingStore) const override;
-};
-
 /** Goal: prioritise max ratio of bound args */
 class MaxRatioSips : public SipsMetric {
 public:
@@ -158,16 +147,6 @@ class ProfileUseSips : public SipsMetric {
     const analysis::ProfileUseAnalysis& profileUse;
 };
 
-/** Goal: prioritise (1) all-bound, then (2) deltas, and then (3) left-most */
-class DeltaSips : public SipsMetric {
-public:
-    DeltaSips() = default;
-
-protected:
-    std::vector<double> evaluateCosts(
-            const std::vector<Atom*> atoms, const BindingStore& bindingStore) const override;
-};
-
 /** Goal: prioritise (1) all-bound, then (2) input, and then (3) left-most */
 class InputSips : public SipsMetric {
 public:
@@ -183,19 +162,4 @@ class InputSips : public SipsMetric {
     const analysis::IOTypeAnalysis& ioTypes;
 };
 
-/** Goal: prioritise (1) all-bound, then (2) deltas, then (3) input, and then (4) left-most */
-class DeltaInputSips : public SipsMetric {
-public:
-    DeltaInputSips(const Program& program, const analysis::IOTypeAnalysis& ioTypes)
-            : program(program), ioTypes(ioTypes) {}
-
-protected:
-    std::vector<double> evaluateCosts(
-            const std::vector<Atom*> atoms, const BindingStore& bindingStore) const override;
-
-private:
-    const Program& program;
-    const analysis::IOTypeAnalysis& ioTypes;
-};
-
 }  // namespace souffle::ast