pan/mdg: Remove bundle interference code

pan/mdg: Remove bundle interference code

This incorrectly worked around the r1 issue fixed earlier.

total instructions in shared programs: 50514 -> 50509 (<.01%)
instructions in affected programs: 826 -> 821 (-0.61%)
helped: 10
HURT: 5
helped stats (abs) min: 1 max: 1 x̄: 1.00 x̃: 1
helped stats (rel) min: 1.10% max: 4.17% x̄: 2.04% x̃: 1.59%
HURT stats (abs)   min: 1 max: 1 x̄: 1.00 x̃: 1
HURT stats (rel)   min: 1.16% max: 5.00% x̄: 3.10% x̃: 2.17%
95% mean confidence interval for instructions value: -0.87 0.21
95% mean confidence interval for instructions %-change: -1.90% 1.25%
Inconclusive result (value mean confidence interval includes 0).

total bundles in shared programs: 25680 -> 25675 (-0.02%)
bundles in affected programs: 539 -> 534 (-0.93%)
helped: 10
HURT: 5
helped stats (abs) min: 1 max: 1 x̄: 1.00 x̃: 1
helped stats (rel) min: 1.54% max: 9.09% x̄: 3.51% x̃: 2.22%
HURT stats (abs)   min: 1 max: 1 x̄: 1.00 x̃: 1
HURT stats (rel)   min: 2.22% max: 8.33% x̄: 5.44% x̃: 4.17%
95% mean confidence interval for bundles value: -0.87 0.21
95% mean confidence interval for bundles %-change: -3.40% 2.35%
Inconclusive result (value mean confidence interval includes 0).

total quadwords in shared programs: 40887 -> 40887 (0.00%)
quadwords in affected programs: 0 -> 0
helped: 0
HURT: 0

total registers in shared programs: 3916 -> 3916 (0.00%)
registers in affected programs: 22 -> 22 (0.00%)
helped: 2
HURT: 2
helped stats (abs) min: 1 max: 1 x̄: 1.00 x̃: 1
helped stats (rel) min: 16.67% max: 25.00% x̄: 20.83% x̃: 20.83%
HURT stats (abs)   min: 1 max: 1 x̄: 1.00 x̃: 1
HURT stats (rel)   min: 16.67% max: 16.67% x̄: 16.67% x̃: 16.67%
95% mean confidence interval for registers value: -1.84 1.84
95% mean confidence interval for registers %-change: -36.96% 32.79%
Inconclusive result (value mean confidence interval includes 0).

total threads in shared programs: 2455 -> 2455 (0.00%)
threads in affected programs: 0 -> 0
helped: 0
HURT: 0

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5513>