wit: remove ConstrainTo

Author: ydnar

wit/package.go

@@ -48,24 +48,6 @@ func (p *Package) dependsOn(dep Node) bool {
 	return done
 }
 
-// constrainTo destructively constrains p to node.
-func (p *Package) constrainTo(node Node) {
-	p.Worlds.All()(func(name string, w *World) bool {
-		if !DependsOn(w, node) {
-			p.Worlds.Delete(name)
-			return true
-		}
-		w.constrainTo(node)
-		return true
-	})
-	p.Interfaces.All()(func(name string, i *Interface) bool {
-		if !DependsOn(node, i) {
-			p.Interfaces.Delete(name)
-		}
-		return true
-	})
-}
-
 func comparePackages(a, b *Package) int {
 	switch {
 	case a == b:

wit/resolve.go

@@ -33,38 +33,6 @@ func (r *Resolve) Clone() *Resolve {
 	return &c
 }
 
-// ConstrainTo destructively modifies the contents of r to only include
-// the package(s), world(s), interface(s), and type(s) necessary to
-// represent node. The resulting [Resolve] may be used to generate
-// minimal WIT to represent node.
-// The node argument must be a member of r.
-// To preserve data, call Clone first.
-func (r *Resolve) ConstrainTo(node Node) {
-	r.Packages = slices.DeleteFunc(r.Packages, func(pkg *Package) bool {
-		if !DependsOn(node, pkg) && !DependsOn(pkg, node) {
-			return true // delete
-		}
-		pkg.constrainTo(node)
-		return false
-	})
-
-	r.Worlds = slices.DeleteFunc(r.Worlds, func(w *World) bool {
-		if !DependsOn(w, node) {
-			return true // delete
-		}
-		w.constrainTo(node)
-		return false
-	})
-
-	r.Interfaces = slices.DeleteFunc(r.Interfaces, func(i *Interface) bool {
-		return !DependsOn(node, i)
-	})
-
-	r.TypeDefs = slices.DeleteFunc(r.TypeDefs, func(t *TypeDef) bool {
-		return !DependsOn(node, t)
-	})
-}
-
 // AllFunctions returns a [sequence] that yields each [Function] in a [Resolve].
 // The sequence stops if yield returns false.
 //

wit/world.go

@@ -134,22 +134,6 @@ func (w *World) dependsOn(dep Node) bool {
 	return done
 }
 
-// constrainTo destructively constrains w to node.
-func (w *World) constrainTo(node Node) {
-	w.Imports.All()(func(name string, i WorldItem) bool {
-		if !DependsOn(node, i) {
-			w.Imports.Delete(name)
-		}
-		return true
-	})
-	w.Exports.All()(func(name string, i WorldItem) bool {
-		if !DependsOn(node, i) {
-			w.Exports.Delete(name)
-		}
-		return true
-	})
-}
-
 // A WorldItem is any item that can be exported from or imported into a [World],
 // currently either an [InterfaceRef], [TypeDef], or [Function].
 // Any WorldItem is also a [Node].