quackboot (same idea as klompboot), from audit6

this is based directly on the audit6 final revision.

same idea as klompboot. remove u-boot and arm support,
remove pico-serprog, remove support for making release
archives, and basically see how small the build
system can possible get.

quackboot *beats* the very first klompboot, at 790 lines,
because klompboot 1 was just over 800 lines. klompboot 2
was 701 lines. vendor file logic is about 200 sloc so
the next klompboot will be about 600 lines.

this is the very first quackboot.

Signed-off-by: Leah Rowe <leah@libreboot.org>

config/git/docs/pkg.cfg

@@ -1,3 +0,0 @@
-rev="e72d055915c3a9ffe739982946e101b146b2483c"
-url="https://codeberg.org/vimuser/untitled"
-bkup_url="https://notabug.org/untitled/untitled"

config/git/pico-sdk/pkg.cfg

@@ -1,3 +0,0 @@
-rev="6a7db34ff63345a7badec79ebea3aaef1712f374"
-url="https://codeberg.org/libreboot/pico-sdk"
-bkup_url="https://github.com/raspberrypi/pico-sdk"

config/git/pico-serprog/pkg.cfg

@@ -1,4 +0,0 @@
-rev="e75e3a20e63269a5e3189bc2e49a6a81d45a636a"
-url="https://codeberg.org/libreboot/pico-serprog"
-bkup_url="https://git.disroot.org/libreboot/pico-serprog"
-depend="pico-sdk"

config/git/stm32-vserprog/pkg.cfg

@@ -1,3 +0,0 @@
-rev="8fcf0a4d41800631b571fa7bbd1d8b251f0a2111"
-url="https://codeberg.org/libreboot/stm32-vserprog"
-bkup_url="https://git.disroot.org/libreboot/stm32-vserprog"

config/git/u-boot/pkg.cfg

@@ -1,3 +0,0 @@
-rev="HEAD"
-url="https://source.denx.de/u-boot/u-boot.git"
-bkup_url="https://github.com/u-boot/u-boot.git"