Moved *Range.step() functions to stdlib.

runtime/src/jet/ByteRange.java

@@ -79,13 +79,6 @@ public final class ByteRange implements Range<Byte>, ByteIterable {
         return result;
     }
 
-    public ByteIterator step(int step) {
-        if (step < 0)
-            return new ByteSequenceIterator(getEnd(), getStart(), step);
-        else
-            return new ByteSequenceIterator(getStart(), getEnd(), step);
-    }
-
     public byte getStart() {
         return start;
     }

runtime/src/jet/CharRange.java

@@ -79,13 +79,6 @@ public final class CharRange implements Range<Character>, CharIterable {
         return result;
     }
 
-    public CharIterator step(int step) {
-        if (step < 0)
-            return new CharacterSequenceIterator(getEnd(), getStart(), step);
-        else
-            return new CharacterSequenceIterator(getStart(), getEnd(), step);
-    }
-
     public char getStart() {
         return start;
     }

runtime/src/jet/DoubleRange.java

@@ -77,13 +77,6 @@ public final class DoubleRange implements Range<Double> {
         return result;
     }
 
-    public DoubleIterator step(double step) {
-        if (step < 0)
-            return new DoubleSequenceIterator(getEnd(), getStart(), step);
-        else
-            return new DoubleSequenceIterator(getStart(), getEnd(), step);
-    }
-
     public double  getStart() {
         return start;
     }

runtime/src/jet/FloatRange.java

@@ -73,13 +73,6 @@ public final class FloatRange implements Range<Float> {
         return result;
     }
 
-    public FloatIterator step(float step) {
-        if (step < 0)
-            return new FloatSequenceIterator(getEnd(), getStart(), step);
-        else
-            return new FloatSequenceIterator(getStart(), getEnd(), step);
-    }
-
     public float  getStart() {
         return start;
     }

runtime/src/jet/IntRange.java

@@ -79,13 +79,6 @@ public final class IntRange implements Range<Integer>, IntIterable {
         return result;
     }
 
-    public IntIterator step(int step) {
-        if (step < 0)
-            return new IntSequenceIterator(getEnd(), getStart(), step);
-        else
-            return new IntSequenceIterator(getStart(), getEnd(), step);
-    }
-
     public int getStart() {
         return start;
     }

runtime/src/jet/LongRange.java

@@ -80,13 +80,6 @@ public final class LongRange implements Range<Long>, LongIterable {
         return result;
     }
 
-    public LongIterator step(long step) {
-        if (step < 0)
-            return new LongSequenceIterator(getEnd(), getStart(), step);
-        else
-            return new LongSequenceIterator(getStart(), getEnd(), step);
-    }
-
     public long getStart() {
         return start;
     }

runtime/src/jet/ShortRange.java

@@ -79,13 +79,6 @@ public final class ShortRange implements Range<Short>, ShortIterable {
         return result;
     }
 
-    public ShortIterator step(int step) {
-        if (step < 0)
-            return new ShortSequenceIterator(getEnd(), getStart(), step);
-        else
-            return new ShortSequenceIterator(getStart(), getEnd(), step);
-    }
-
     public short getStart() {
         return start;
     }