Drop MD5 checksum data

The Releases pages have SHA512 and SHA256 checksums.

sane-md5sums.txt

@@ -1,23 +0,0 @@
-f54e7819e98fa15ffc70bac39eb49123  sane-backends-1.0.10.tar.gz
-7f0f1a7dbc1cf164f7adc2f1cb4ec13b  sane-backends-1.0.11.tar.gz
-28d4d7469cd688dac94c7a415a81a6bb  sane-backends-1.0.12.tar.gz
-9a158413180a752f8af6f11792154a42  sane-backends-1.0.13.tar.gz
-7ae5bf91aea34ef7956df6f53cf073bd  sane-backends-1.0.14.tar.gz
-3b804f35cdfbc5ad2d201ffe078bbac9  sane-backends-1.0.15.tar.gz
-bec9b9262246316b4ebfe2bc7451aa28  sane-backends-1.0.16.tar.gz
-b51c10da8a81a04e1bae88c9e6556df2  sane-backends-1.0.17.tar.gz
-7ca7e2908e24721471de92cf40c75e60  sane-backends-1.0.18.tar.gz
-8c0936272dcfd4e98c51512699f1c06f  sane-backends-1.0.19.tar.gz
-a0cfdfdebca2feb4f2ba5d3418b15a42  sane-backends-1.0.20.tar.gz
-be586a23633949cf2ecf0c9c6d769130  sane-backends-1.0.21.tar.gz
-fadf56a60f4776bfb24491f66b617cf5  sane-backends-1.0.22.tar.gz
-e226a89c54173efea80e91e9a5eb6573  sane-backends-1.0.23.tar.gz
-1ca68e536cd7c1852322822f5f6ac3a4  sane-backends-1.0.24.tar.gz
-f9ed5405b3c12f07c6ca51ee60225fe7  sane-backends-1.0.25.tar.gz
-b10a08785f92a4c07ad961f4d843c934  sane-backends-1.0.27.tar.gz
-a7de89c3e67495e8a38ca63b2ff693c4  sane-frontends-1.0.10.tar.gz
-59b143e12c926726db16983d288aa1a1  sane-frontends-1.0.11.tar.gz
-6a6166428491b268f5ebe03f16d1bc1f  sane-frontends-1.0.12.tar.gz
-2930626e627df49b45192a722cedc8a6  sane-frontends-1.0.13.tar.gz
-c63bf7b0bb5f530cf3c08715db721cd3  sane-frontends-1.0.14.tar.gz
-

source.html

@@ -59,11 +59,6 @@
       of supported platforms</a> for details.
     </p>
 
-    <p>
-      To check that the code hasn't been changed, there are <a
-      href="sane-md5sums.txt">md5 hashes</a> of the current releases.
-    </p>
-
     <h2><a href="cvs.html">Unstable (Development) Source</a></h2>
 
     <p>