remove individual unit tests from the README.md (#1637)

the list is incomplete and we don't break out the subdirectories
for any of the other modules

README.md

@@ -46,36 +46,12 @@ There are several core types of microphysics routines hosted here:
 * `screening/`: the screening routines for nuclear reactions. These
   are called by the various networks
 
-* `unit_test/`: code specific to unit tests within this repo. In
-  particular,
+* `unit_test/`: a collection of unit tests that exercise the different
+  pieces of Microphysics
 
-  - `burn_cell` will do a single zone burn given (rho, T)
-    and a composition
-
-  - `burn_cell_sdc` will do a single zone burn in the simplified-SDC
-    framework.
-
-  - `test_eos` will test an equation of state by first calling it with
-    (rho, T), and then calling it with other inputs to recover rho
-    and/or T. A cube of data, with rho, T, and X is tested.
-
-  - `test_react` will call a reaction network on a cube of
-    data (rho, T, X).
-
-  - `test_rhs` will evaluate the right-hand-side of a network
-    without integrating it.
-
-  - `test_sdc` tests integration using the set of variables for
-    simplified-SDC.
-
-  - `test_jac` evaluates the Jacobian for comparison between the
-    analytical and numerical Jacobians.
-
-  - `test_screening` evaluates the screening routines.
-
-* `util`: linear algebra routines for the integrators
-  (specifically a linear system solver from LINPACK),
-  other math routines, and build scripts
+* `util`: linear algebra routines for the integrators (specifically a
+  linear system solver from LINPACK), the hybrid Powell solver, other
+  math routines, and build scripts
 
 
 # AMReX-Astro Codes
@@ -88,7 +64,7 @@ the AMReX-Astro codes, Maestro and Castro.
 * MAESTROeX: http://amrex-astro.github.io/MAESTROeX/
 
 * Quokka: https://quokka-astro.github.io/quokka/
- 
+
 To use this repository with AMReX codes, set `MICROPHYSICS_HOME` to
 point to the `Microphysics/` directory.