Removed tracer

Author: LPeter1997

src/Draco.Compiler/Internal/Solver/ConstraintGraphTracer.cs

@@ -1,7 +1,5 @@
 using System.Collections.Generic;
 using System.Linq;
-using Draco.Chr.Constraints;
-using Draco.Chr.Solve;
 using Draco.Compiler.Api.Diagnostics;
 using Draco.Compiler.Api.Syntax;
 using Draco.Compiler.Internal.Binding;
@@ -10,7 +8,6 @@
 using Draco.Compiler.Internal.Diagnostics;
 using Draco.Compiler.Internal.Solver.OverloadResolution;
 using Draco.Compiler.Internal.Symbols;
-using IChrSolver = Draco.Chr.Solve.ISolver;
 
 namespace Draco.Compiler.Internal.Solver;
 

src/Draco.Compiler/Internal/Solver/ConstraintSolver.cs

@@ -3,17 +3,13 @@
 using System.Collections.Immutable;
 using System.Diagnostics;
 using System.Linq;
-using Draco.Chr.Constraints;
-using Draco.Chr.Rules;
 using Draco.Compiler.Internal.Binding;
 using Draco.Compiler.Internal.Diagnostics;
 using Draco.Compiler.Internal.Solver.Constraints;
 using Draco.Compiler.Internal.Solver.OverloadResolution;
 using Draco.Compiler.Internal.Symbols;
 using Draco.Compiler.Internal.Symbols.Error;
 using Draco.Compiler.Internal.Symbols.Synthetized;
-using static Draco.Chr.Rules.RuleFactory;
-using IChrSolver = Draco.Chr.Solve.ISolver;
 
 namespace Draco.Compiler.Internal.Solver;
 

src/Draco.Compiler/Internal/Solver/ConstraintSolver_Rules.cs

@@ -1,6 +1,5 @@
 using System.Collections.Immutable;
 using System.Linq;
-using Draco.Chr.Constraints;
 using Draco.Compiler.Internal.Solver.OverloadResolution;
 using Draco.Compiler.Internal.Symbols;
 using Draco.Compiler.Internal.Symbols.Synthetized;