Removed description fields in .cabal files

We provide READMEs.

Author: coot

io-classes/io-classes.cabal

@@ -2,7 +2,6 @@ cabal-version:       3.4
 name:                io-classes
 version:             0.4.0.0
 synopsis:            Type classes for concurrency with STM, ST and timing
--- description:
 license:             Apache-2.0
 license-files:
   LICENSE

io-sim/io-sim.cabal

@@ -2,7 +2,6 @@ cabal-version:       3.4
 name:                io-sim
 version:             0.4.0.0
 synopsis:            A pure simulator for monadic concurrency with STM
--- description:
 license:             Apache-2.0
 license-files:
   LICENSE

si-timers/si-timers.cabal

@@ -3,7 +3,6 @@ name:                si-timers
 version:             0.4.0.0
 synopsis:            Timers using SI units (seconds) which are safe on 32-bit
                      platforms.
--- description:
 license:             Apache-2.0
 license-files:
   LICENSE

strict-stm/strict-stm.cabal

@@ -2,9 +2,6 @@ cabal-version:       3.0
 name:                strict-stm
 version:             0.4.0.0
 synopsis:            Strict STM interface polymorphic over stm implementation.
-description:         The `strict-stm` package gives a strict interface to stm,
-                     currently either one provided by `stm` package for the
-                     `IO` monad or `io-sim` package for the `IOSim` monad.
 license:             Apache-2.0
 license-files:
   LICENSE