[epiphany] Update HACKING.md, remove reference to WebKitDatabaseProcess

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 7c6903f46a82204f58c09f2c0474b06c2ce806b8
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Wed May 13 01:15:22 2020 +0000

    Update HACKING.md, remove reference to WebKitDatabaseProcess
    
    This was replaced with WebKitStorageProcess several years ago, and then later merged into 
WebKitNetworkProcess.

 HACKING.md | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/HACKING.md b/HACKING.md
index c68511b3a..0d1b73791 100644
--- a/HACKING.md
+++ b/HACKING.md
@@ -129,8 +129,7 @@ robustness of the browser. The UI process (the main epiphany process) runs
 several subprocesses:
 
  * Any number of WebKitWebProcesses, which handle rendering web content
- * One WebKitNetworkProcess, which handles most network requests
- * One or zero WebKitDatabaseProcesses, which handles IndexedDB
+ * One WebKitNetworkProcess, which handles network requests, storage, etc.
 
 In WebKitGTK, by default each WebKitWebView shares the same WebKitWebProcess.
 This can reduce overall resource usage, but it results in a less-stable browser