Remove readme about java 1.4 vs 1.5, as we've ditched java 1.4 support

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@933958 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/src/ooxml/README.interfaces b/src/ooxml/README.interfaces
deleted file mode 100644 (file)
index 0b9e0be..0000000
--- a/src/ooxml/README.interfaces
+++ /dev/null
@@ -1,44 +0,0 @@
-            Fun with Interfaces
-            -------------------
-
-Let us consider a simple case
-
-  public Interface IFoo {}
-  public Interface IBar {
-     public IFoo getFoo();
-  }
-
-  public class RealFoo implements IFoo {}
-  public class RealBar implements IBar {
-     public RealFoo getFoo() { return new RealFoo(); }
-  }
-
-Looks ok, doesn't it? If you access RealBar directly, you get back a
-RealFoo. If you access RealBar via the IBar interface, you get back a
-IFoo object instead. All looks good.
-
-Only snag - this doesn't work with any JDK older than 1.5. If you're on
-JDK 1.3 or JDK 1.4, you will get a compile time error about incompatible
-return signatures.
-
-
-At the moment, we're still committed to having the core of POI work on
-JDK 1.3 / JDK 1.4. If you want the OOXML support, then you need to move
-to JDK 1.5. This allows us a sort of work-around for the problems:
-
-JDK 1.3 / JDK 1.4:
- You can't use the OOXML stuff anyway, so you probably don't care about
-  the new interfaces
- So, have the existing code (hssf) compile against dummy interfaces, which 
-  don't actually provide any methods
- You can't then use the interfaces, but you probably didn't want to anyway
- These live in src/ooxml/interfaces-jdk14
-
-JDK 1.5:
- Compile the existing code (hssf) against full interfaces. Users can still
-  use the concrete HSSF classes if they want, or if they use the interfaces,
-  their code will work with the ooxml support too
- Need to change any methods that take a concrete object (eg HSSFCell) to
-  take the interface (eg Cell), and cast, otherwise they're not compatible
-  with the interface contract (which specifies Cell not HSSFCell).
- These live in src/ooxml/interfaces-jdk15