remove CurrentVersion* when older than oldest build entry

This causes F-Droid to never install this app, except for manually via the
Versions list in AppDetails.  I also wrote a lint test for this. This also
disables AutoUpdateMode because checkupdates readds the old version.

fdroid/fdroidserver!605

These were removed before and a bug in checkupdates readded them:
abd3f8411c

fdroid/fdroidserver@a5ec1703c9

metadata/com.derek_s.hubble_gallery.txt

@@ -29,7 +29,9 @@ Build:1.5.0,20
         sed -i -e '/crashlytics/,+2d' -e '/fabric/d' build.gradle && \
         sed -i -e '/Crashlytics/d' -e '/fabric/d' src/release/java/com/derek_s/hubble_gallery/base/HubbleApplicationRelease.java
 
+Maintainer Notes:
+ UpdateCheckMode disabled because checkupdates sets it to an old version
+.
+
 Auto Update Mode:Version %v
-Update Check Mode:Tags
-Current Version:1.2.5
-Current Version Code:15
+Update Check Mode:None

metadata/fr.cap_rel.fr.sagc_plongee.fr.nitroxCalc.txt

@@ -20,7 +20,9 @@ Build:0.6.0,6008
     gradle=yes
     prebuild=echo "android { lintOptions { checkReleaseBuilds false } }" >> build.gradle
 
+Maintainer Notes:
+ UpdateCheckMode disabled because checkupdates sets it to an old version
+.
+
 Auto Update Mode:Version release-%v
-Update Check Mode:Tags
-Current Version:0.6.0
-Current Version Code:600
+Update Check Mode:None

metadata/org.mupen64plusae.v3.alpha.yml

@@ -98,7 +98,7 @@ Builds:
         ../ndkLibs/libs/release/armeabi-v7a/.
     ndk: r18b
 
+MaintainerNotes: UpdateCheckMode disabled because checkupdates sets it to an old version
+
 AutoUpdateMode: Version v%v
-UpdateCheckMode: Tags
-CurrentVersion: 3.0.10 (beta)
-CurrentVersionCode: 85
+UpdateCheckMode: None