rename PageStore#removeRecord to removeFromCache, makes the other code much easier to understand

h2/src/main/org/h2/index/PageBtree.java

@@ -206,7 +206,7 @@ public abstract class PageBtree extends Page {
     void setPageId(int id) {
         changeCount = index.getPageStore().getChangeCount();
         written = false;
-        index.getPageStore().removeRecord(getPos());
+        index.getPageStore().removeFromCache(getPos());
         setPos(id);
         index.getPageStore().logUndo(this, null);
         remapChildren();

h2/src/main/org/h2/index/PageBtreeIndex.java

@@ -271,7 +271,7 @@ public class PageBtreeIndex extends PageIndex {
             PageBtree root = getPage(rootPageId);
             root.freeRecursive();
             root = PageBtreeLeaf.create(this, rootPageId, PageBtree.ROOT);
-            store.removeRecord(rootPageId);
+            store.removeFromCache(rootPageId);
             store.update(root);
             rowCount = 0;
         } finally {

h2/src/main/org/h2/index/PageData.java

@@ -162,7 +162,7 @@ abstract class PageData extends Page {
      */
     void setPageId(int id) {
         int old = getPos();
-        index.getPageStore().removeRecord(getPos());
+        index.getPageStore().removeFromCache(getPos());
         setPos(id);
         index.getPageStore().logUndo(this, null);
         remapChildren(old);

h2/src/main/org/h2/index/PageDataIndex.java

@@ -391,7 +391,7 @@ public class PageDataIndex extends PageIndex {
             PageData root = getPage(rootPageId, 0);
             root.freeRecursive();
             root = PageDataLeaf.create(this, rootPageId, PageData.ROOT);
-            store.removeRecord(rootPageId);
+            store.removeFromCache(rootPageId);
             store.update(root);
             rowCount = 0;
             lastKey = 0;

h2/src/main/org/h2/store/PageStore.java

@@ -1339,7 +1339,7 @@ public class PageStore implements CacheWriter {
      *
      * @param pageId the page id
      */
-    public synchronized void removeRecord(int pageId) {
+    public synchronized void removeFromCache(int pageId) {
         cache.remove(pageId);
     }